Abstract
© 2016 Elsevier Ltd and Techna Group S.r.l. The Er3+-doped bismuth titanate (Bi4Ti3O12, BIT) nanoparticles were synthesized by a combined sol–gel and hydrothermal method under a partial oxygen pressure of 30 bar. The composition and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering. They showed pure and homogeneous spherical BIT nanoparticles with a size below the 30 nm. The incorporation of Er ions showed a strong decrease in the lattice parameters, as well as averaged particle size. The photoluminescence up-conversion (excitation wavelength =1480 nm) showed an enhancement of the infrared emission (980 nm) as Er concentration increased, achieving a maximum for 6% mol, while photoluminescence spectra (excitation wavelength =473 nm) showed a strong green emission (529 and 553 nm) with a maximum at 4% mol.
Original language | English |
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Pages (from-to) | 3623-3630 |
Journal | Ceramics International |
Volume | 43 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Mar 2017 |
Keywords
- Hydrothermal
- Oxide materials
- Photoluminescence
- Sol–gel processes